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Medium, CVSS 5.9

OpenShift OSIN vulnerable to Observable Timing Discrepancy

CVE-2021-4294GHSA-m7qp-cj9p-gj85

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/openshift/osin 1.0.2-0.20210113124101-8612686d6dda), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2021-4294: 0.72% estimated exploitation activity in the next 30 days; percentile 53.98 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

A vulnerability was found in OpenShift OSIN. It has been classified as problematic. This affects the function ClientSecretMatches/CheckClientSecret. The manipulation of the argument secret leads to observable timing discrepancy. The name of the patch is 8612686d6dda34ae9ef6b5a974e4b7accb4fea29. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-216987.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-m7qp-cj9p-gj85

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2021-4294

Advisory: OpenShift OSIN vulnerable to Observable Timing Discrepancy
IDs: CVE-2021-4294, GHSA-m7qp-cj9p-gj85
Record: https://patchnext.com/advisories/cve-2021-4294 (revision 1, source checked 26 Oct 2026, 15:03 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/openshift/osin 1.0.2-0.20210113124101-8612686d6dda. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/openshift/osin: affected < 1.0.2-0.20210113124101-8612686d6dda; fixed in 1.0.2-0.20210113124101-8612686d6dda

## Suggested inspection (read-only)
- Go github.com/openshift/osin: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/openshift/osin.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-m7qp-cj9p-gj85 (GitHub-reviewed advisory GHSA-m7qp-cj9p-gj85 lists affected ranges: Go github.com/openshift/osin >=0 <1.0.2-0.20210113124101-8612686d6dda)

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